C-post is always a good stand by.
However....you can get some good ideas from scoping out google earth, go hunt on the states site..and maybe some quadrangle maps. The quadrangle maps are good for specific regions....just google wa quadrangle and you can get there. Keep in mind the regs change from unit to unit for blacktail in regards to any deer, any buck, and weapons restrictions. Get behind the gates, hike, explore, look for some cuts and check the edges and corners for sign. Blacktails are sneaky little buggers. Also...grap a bear tag. When out scouting for deer you never know when ol blackie will pop out.
Have fun, be safe, and good luck on your hunts.
Oh, yeah...what is the worst thing you end up doing....spending a day hiking/scouting/hunting with your boy? Good enough for me.